The Nation al Gallery in London is mentioned in Chapter 11 as a popular spot. It was founded in 1824 and is home to thousands of paintings and pieces of art. 

A club that was founded for men and women of great intelligence and that have gained some distinction in the fields of science, literature, or engineering. It served as a meeting place for these great minds to come together. It is said that the father of the girl in chapter IV would go here.

 A square in Marylebon, England where Mary finds herslef at the beginning of chapter 8.

https://en.wikipedia.org/wiki/Portman_Square